Key points of high-yield cultivation techniques for summer maize

1, seed treatment

The basic principle of seed selection is to make full use of the local natural resources and production conditions, and focus on selecting excellent varieties with good comprehensive resistance, high yield and high quality. After selecting good varieties, you should also use high-quality seeds to achieve high yield and quality. Choose high-quality seeds with bright color, full grain, uniform size, no insects and no damage. According to the need, the corresponding insecticides, fungicides, micro-fertilizers, etc. are used to seed the seeds to achieve the purpose of controlling pests and diseases and promoting growth. Coated seeds can also be used in areas where conditions permit.

2, sowing requirements

The suitable sowing date of corn is mainly determined by the corn planting system, temperature, moisture and variety. Early sowing is the key to increasing yield of summer maize. The seeding density should be determined comprehensively according to factors such as variety, plant type and environmental conditions. Early-maturing varieties should be more dense, and late-maturing varieties should be more sparse. The suitable sowing depth is determined according to the soil quality, soil moisture and seed size, and is generally 3 to 5 cm. If the soil texture is heavy, the moisture is better, it may be appropriate; the soil texture is loose, the sandy soil that is easy to dry, can be properly deep; the large seeds can be properly deeper.

3, early seedlings

Three-leaf seedlings, five leaves fixed seedlings, to prevent seedlings. When the seedlings are planted, the weak plants are removed, and the lack of seedlings and ridges are left with double plants, and the weak plants are gradually removed during management.

4, water management

In the case of sowing of the foot, the small bell mouth generally does not need to be watered, the purpose is to control the promotion, in case of drought, irrigation is necessary. After entering the big bell mouth period, you can't lack water. To reach the surface, you can see the wetness, and meet the demand for moisture in the jointing, big bell mouth, tasseling, flowering and grouting. Pay special attention to pouring yellow skin water, don't stop too early. Water to ensure the ripening of live stalks and increase the weight of the granules.

5, reasonable topdressing

The main producing areas of summer maize are mostly two-year-old. Because of the busy season during planting, there are many places where the seedlings are not destroyed and the base fertilizer is not applied. In addition, the summer maize has a short growth period, and the early stage requires a large amount of fertilizer. The seedlings need to be The soil absorbs a lot of nutrients and grows fast. Therefore, summer corn should be tightened for topdressing after the seedlings are fixed. Generally, 20 to 30 kilograms of “zinc-powered” high-nitrogen compound fertilizer is applied per acre, accounting for 40% of the total topdressing amount; The zinc-powered high-nitrogen compound fertilizer is 30-40 kg, accounting for 60% of the total topdressing amount. The topdressing method is suitable for strip application or acupoint application.

6, appropriate late harvest

Under the premise of striving for early sowing, summer corn is harvested properly, which is an effective measure to increase grain weight and increase yield. Therefore, without affecting the normal planting of wheat, corn should be harvested as late as possible. Our harvesting standard is: the leaves are white, and the grain milk is completely gone.